Silicone / Rubber Flat Washer / Spacer. Silicone / Rubber Flat Washer / Spacer - 6 mm. Silicone / Rubber Flat Washer / Spacer - 10 mm. Silicone / Rubber Flat Washer / Spacer - 12 mm. Silicone / Rubber Flat Washer / Spacer - 16 mm.
eBay