The document describes several types of cable rollers used for laying cables in trenches. The TRP76 is a narrow roller for cables up to 76mm diameter. The HSP125 and HBSP125 are heavy duty rollers for cables up to 125mm, with the HBSP125 able to be placed over existing cables. Corner rollers include the CR1 angle roller for heavy cables around corners, the CR2 skid roller for corner work, and the CR4 triple corner roller for difficult corners using three rollers. All provide details of material, size, and weight.