Features: brand new and high quality Tested by sticking to the motherboard: PTFE-Teflon sound will be crisper, and silicone sound will be dull. Remove the for 3M or transparent PC release layer first, and then separate each rubber pad. Product designed of two kinds of materials: Black PTFE-Teflon / Transparent Silica Gel. The thickness is about 0.2mm, quantity is 20pcs Only for PCB satellite axis,bring great benefits to your mechanical keyboard. Specifications: Style: Standard Style: Small Model: Film Quantity: 20Pcs Materials:silica gel and Non-stick coating (PTFE) Black PTFE-Teflon Size:approx 20.5x7x0.25mm White Silicone Size: approx 20.5x7x0.2mm Color: Black / White Thickness: 0.2mm For: Mechanical Keyboard PCB Satellite Axis Package Includes: 20 Pcs x Stabilizer Film note: This only applies to pcb satellite shafts. If transparent satellite shafts are used, PTFE-Teflon is recommended. The transparent satellite shafts are easy to lift and the steel wires are easy to fall off. You need to pay attention when adjusting. Because of the resolution of the screen, the color may be a little different. There may be some errors in size due to the way of measurement.