Selectpart friction pads to fit Butler splicer brakes View H300B friction pad drawing The following chart details available friction pads based on Coefficient of Friction* and Material Composition.Selectpart #COFMaterialDescriptionSDSPrice RequestH300BHighCarbon base with various phenolic fillers and bonding agents.General use. Longer pad life typical. Stable COF at elevated temps. May glaze at high temp, low pressure, low speed. High propensity for noise.Go To Form*Coefficient of Friction (COF) rating is approximate and may vary with changes in environmental conditions.