So I want to protect my newly acquired SF 1098. I saw these on ebay and looks wise they dont hurt. Im wondering about performance.:stickpoke Anyone dealt with Delrin Carbon material before? or suggestions?

Hello everyone, looking into frame sliders for my new SF1098. Came across nice looking ones on this ebay site - with decent looks. What do you experienced guys think? Ever heard of Delrin Carbon material or any recommendations? :stickpoke