Thermally treated American maple, with the aim of eliminating mechanical tensions and consequently increasing stability. To the touch it will be smoother and harder, as the pores will be perfectly closed, and any trace of starch or sugars will disappear, normally the 'humidity' varies from 3 to 6% Specific weight from 450 to 550 Kg per cubic meter The necks for classical guitar, depending on availability, may be 90cm x 2.2cm long without base, or 65cm with 15cm x 8.3cm x base 5cm or 30cm x 8.3cm x 2.2cm Guitar 70cm x 10cm x 2.5cm Bass 90cm x 10cm x 2.5cm Classical guitar See description above NB The necks are generally supplied with a tangential cut, the fourth according to availability