What size screws should i get to connect projector to the shroud, since it didnt come with any?

You should NOT screw the shroud to the projector. You can easily force the screw into a working component or it could affect the light output. Just use JB Weld, or Silicone. Or dont be cheap and buy $5 Projector Shroud Centric Rings that will make the shroud "click" on and off the projectors housing and wont require any screws (LOL!) or JB Weld.

Exactly how long is the projector?

The projector is already installed in my car but if I had to guess i'd say the total length from the projector lens to the end of its housing is around 6 inches. This is just my guess. I retrofitted it in a 99 civic headlamp with no clearance issues. I would contact the seller to see if you could get exact dimensions of the product.Thank You.

Are these easy replacements for Spec-d aftermarket headlights?

It depends on the type of car lightingBut mostly it's easyMy car Camry 1994Did not last more than an hour to install almost

My 2015 tundra uses 9003/h4 bulbs. does this convert to h1? or do i use the h4 adapter and a harness?

This is H1 already, H4 adapter comes with it. I kept the H1 and bought HID set with the harness for it.

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Nilight - 10041P 2.5" Mini Projector Lens for H1 Bulb Headlights Retrofit, Custom Headlamps Conversion:Chrome Shround,2 Years Warranty

Nilight - 10041P 2.5" Mini Projector Lens for H1 Bulb Headlights Retrofit, Custom Headlamps Conversion:Chrome Shround,2 Years Warranty

Product ID: 3381313

Details

Brand
Nilight
Color Temperature
4000 Kelvin
Fit Type
Universal Fit
Included Components
2.5" Mini Lens
Light Source Type
Xenon

🔆2.5-inch crystal-clear lens

🔧Universal H1 bulb compatibility

🛠️Complete retrofit kit with adapters

18521 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚗 Light up your night with precision and style—don’t get left in the dark!

PRECISION 2 5 LENS - Crystal-clear optics for razor-sharp beam cutoffs and superior night visibility.
PRO GRADE DURABILITY - Backed by a 2-year warranty and designed for tight spaces—upgrade your ride with confidence.
UNIVERSAL H 1 BULB FIT - Seamlessly retrofit your headlights with widely compatible H1 bulbs and included H4/H7 adapters.
CHROME SHROUD ELEGANCE - Sleek chrome finish perfectly matched for a modern, custom headlamp look.
ALL IN ONE INSTALLATION KIT - Lock rings, adapter plates, and rubber washers included for a hassle-free upgrade.

The Nilight 10041P Mini Projector Lens kit offers a 2.5-inch clear xenon lens designed for H1 bulb headlights retrofit. Featuring universal fitment with included H4/H7 adapter plates and installation accessories, it enables professional-grade custom headlamp conversions with a sleek chrome shroud. Perfect for tight spaces and quad retrofits, this kit delivers sharp beam cutoffs and enhanced night visibility, backed by a 2-year warranty.

Specifications

ASIN	B00B21R0TA
Auto Part Position	Inner
Automotive Fit Type	Universal Fit
Best Sellers Rank	#80,026 in Automotive ( See Top 100 in Automotive ) #448 in Automotive Headlight Assemblies
Brand Name	Nilight
Color Temperature	4000 Kelvin
Customer Reviews	3.9 3.9 out of 5 stars (2,629)
Fit Type	Universal Fit
Global Trade Identification Number	00608090100879
Included Components	2.5" Mini Projector Lens
Item Type Name	Nilight 2.5" Mini Bixenon Projector Lens for H1 Bulb Headlights Retrofit, Custom Headlamps Conversion:chrome Shround,2 Years Warranty
Light Color	4000K Cool White, 6500K Bright White
Light Source	Xenon
Manufacturer	Nilight
Manufacturer Part Number	10041P
Manufacturer Warranty Description	2 Years Warranty
Model Number	10041P
Number of Pieces	8
Set Name	Set of 8
UPC	608090100879
Unit Count	1 Count

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