Specifications include, but are not limited to: Los Angeles Abrasion Machine must be a Gilson #HM-70A Los Angeles Abrasion Machine or equal and must have: Abrasive charge of twelve (12) hardened steel balls. 46-48mm in diameter and 390-445 grams. Meet American Association of State Highway and Transportation Officials (AASHTO) T96, https://www.transportation.org/ and American Society for Testing and Materials (ASTM) C535, ASTM C131/13M https://www.astm.org/ test methods. Enclosed slip clutch drive chain. Cabinet must be fully enclosed with sound lessening foam. Viewing window. Electronic safety interlocks. 60Hz-240V. 5.8 amps. 1hp (horse power) motor with overload protection. HMA-132WR removable wear-resistant shelf. 30-33 Revolutions per minute. 28 in Drum diameter. Product Manual, including part replacement list. With optional catch pan - Gilson #HM132WR or equal.