Mpi Maxx Stick Mount with Motor Heat Sink 20mm. A must when upgrading GWS EPS-100/300/350 with Himax HA2015, HA2025 B20/S/L gear motors. Fits all 20mm BL motors - Himax HA2015, HA2025, B20S/L. Has integrated 10mm x 10mm mounting box to fit GWS planes. Made of aluminum, anodized blue. Built-in cooling fins. Aluminium, 7.1grams/0.26oz SKU Number: MPIACC3908